Improvement in flour-bolts



2 Sh t-S t1. LBRUWN. ees hee Flou Blt.

Patented Dec. 19, 1865. l

v51-al 2 Sheets- Sheet 2s 1. BROWN.v

Flour Bolt.

Patented Dec. 19, 1865.

Wal/22066566 MMM N. PETERS, PhnmLilhognp Nrrnn STATES PATENr rtree.

JOHN BROWN, OF UTIOA, NEW YORK.

IMPROVEMENT IN FLOUR-BOLTS.

To all whom it may concern:

Be it known that I, JOHN BROWN, ot Utica, New York, have invented a new and useful Machine or Apparatus for Preparing Wheat or other Grain for Grinding; and I do hereby declare that the following is a full and exact description ot' my said last-mentioned invention, reference being had to the accompanying drawings, and to the letters of reference marked thereon, in which- Figure l is a front elevation; Fig. 2, a rear elevation; Fig. 3, a transverse section through the line UV, and Fig. 4 a longitudinal section through the center.

The purest and best Hour is made by first crushing and hullin g the grain, (instead ofiirst grinding it,) and separating the grits from the bran and oftal, and then grinding such hulled grain or grits into flour and dressing it in the ordinary way; and the nature ot' my invention consists in so constructing the machine of a peculiarly-formed bolt and an air apparatus that it will take the mass as it comes from the crushing and hulling mill and separate the our necessarily formed in the process of hulling and crushing, as well as the bran and oal from the grits, which are left pure and clean, when they may be ground into tlour and dressed -in the ordinary way.

A is the bolt, which may be of the ordinary form and be operated in the usual way; but the cloth is required to be of different grades or degrees ot' ineness, the divisions of which are indicated by the Figs. l, 2, 3, 4, and 5. The nest cloth is used ou division 1, and so on. Division lis covered with cloth No. 7, division 2 with cloth No.1 or 2, division 3 with cloth No. 0, division 4 with cloth N o. 00, and division 5 with cloth as much coa-rser than No. 00 as the latter is coarser than N o. 0 5 but other suitable grades may be used, and the bolt may be divided into a greater or less number of divisions. The hulled or crushed grain is conveyed to the bolt in the usual way,

division oi` the bolt and fall upon the hoppel` O2, and pass down the spout C3 to the conveyer R, to be remixed with other parts ofthe crushed grain for regrinding.

The hulled grain or grits pass through the other divisions of the bolt, and the bran and oft'al are separated -therefrom in the manner now to be described.

B is a i'an for forcing air into the separating apparatus through the passages BBBB, (the amount and direction of which may be controlled by the .valves B2 132,) and thence through the apparatus B3 B3 B3, which apertures have each avalve, B4, therein, to regulate,

n by means of the adjusting-screw B5, the amount ot' air which may pass through. The course ofthe air is indicated by the arrows in black.

The fan may be ot' any form for forcing a light current of air, and may be set in motion by any suitable machinery.

D Dl D2 are hoppers on which the grits fall from the divisions 3, 4, and 5 ot' the bolt, respectively. Under these are a series ot' smaller l1oppers,O O O O. The currents ot'air entering at 153133133 striking the descending grits blow over the lighter parts upon the other series of hoppers, O O' O O', and the still lighter or the bran and oial beyond and into the spouts G G and T, respectively. The bran or oft'al which enters G G passes out at the spout G. The course of the grits and bran is indicated by the arrows in red.

The hoppers O and O have each a regulator, P P, affixed to the upper edge in such manner as to permit of their being turned in any direction from horizontal to vertical, to regulate the quantlty of light grits, bran, or offal which may pass over.

The heavier grits which fall from D and D pass from the hoppers O O into the screens or sieves Q Q', to which a vibrating motion is given from the fan, (by means of the connecting-rod Q2, or by any other suitable means,) and through which they pass into the hoppers I and l', respectively, and out by the spouts l2 and I3, where they may be collected to be used in that form, or may fall into the hoppers I4 and I5, and thence into the conveyer S, to be reground. The oal or bran which passes through or out of the sieves Q and Q is blown into the spout G2 and passes down to the con- -veyer R. The grits which have been blown upon the hoppers O' O O' O' fall into the boppers H and H' and pass into the spouts H2 and H3, and thence intofthe conveyer R.

The coarsest grits which fall from the hopper D are separated and cleaned in the same manner, the heaviest falling into the hopper K and the lightest into the hopper K', While the bran is blown into the spout T, as already stated. The grits in hopper K' pass into the spout L, and thence into the conveyer R.

The hopper K is divided longitudinally into two hoppers, and the mouth of either side may be closed alternately by the iiy or valve K2, and the grits taken out of the spout K2, in order to be again passed through the hulling or crushing stones, if necessary, or they may be passed into the spout L and then to the couveyer E, to be mixed with the contents to be reground.

The bran and uncrush'ed or unhnlled parts which pass out ot' the end of the bolt fall on the hopper D3, and thence into the spout F, and thence into the spout F', Which connects with the sput L. The air which has been forced in by the fan, when it has performed its duty passes out by the spout M, the outer end of which is between the spout F and the top of the spout F', (which has a regulator, P', at the outer edge, like the regulator P on the hoppers O and O',) and blows off all the bran and other light stuft', and the grits pass down F' and L into the conveyer R.

W, W', and W2 are openings in the case, With movable covers to permit the interior to be examined and the parts adjusted, and N N N are like openings for the like purpose, and to permit the regulators P P P to be adjusted.

It will be seen that the apparatus separates the grits into three grades. The hopper I produces the nest, or No.1, I', the next inest, or No. 2 5 and K, the coarsest, or No. 3. For the purpose of obtainirig the very inest of flour the grits, either separately or all together, are ground over again by common millstones in the ordinary Way and dressed in the ordinary bolts. The next grade of grits which passes the hopper K and tl1e-middliugs,and other parts which have passed into the conveyer R are together ground over also and dressed in a similar way, and form flour No. 2, the first iiour which passed through the irst division ot' the bolt being No. 3. y

The valves B2 and P3 and the regulators P P and P', though adding to the perfection of the apparatus and the character of its products, may be dispensed with.

l claim- The combination and arrangementof the bolt, constructed and operating as described, and the air apparatus, also constructed and operating as described, for the uses and purposes mentioned.

JOHN BROWN.

Witnesses:

E. MUNsoN, J. G. ORocKER. 

